Explain the following types of chemical reactions giving two examples for each of them double decomposition reaction.
Double decomposition reaction: A chemical reaction in which two compounds in their aqueous state exchange their ions to form new compounds is called a double decomposition reaction.
AB + CD → CB + AD
e.g. (i) AgNO3 + HCl AgCl + HNO3(aq)
(ii) NaOH (aq) + HCl (aq) NaCl (aq) + H2O.